What was found
FLT#1705, EWR-FLL. 'ON DESCENT FROM 8000" TO 3000" WHILE PASSING THROUGH CLOUDS, NOTICEABLE FUME SMELL OF DIRTY SOCKS. DISSIPATED BEFORE LANDING; COMPLIED WITH INFORMATION NOTICE 2017-T015I SECTION A ISOLATED FAULT TO TYPE 1 (APU) PER TSM 05-50-00-810-085B/TSM 05-50-00-810-085D. THE AIRCRAFT IS OK FOR SERVICE. APU DEFERRED UNDER MDDR 471004. PERFORMED ECS DECONTAMINATION WITH EXTERNAL AIR CART PER AMM 21-00-00. REMOVED AND REPLACED RECIR FILTERS IAW AMM 21-21-41. NO ODOR IS PRESENT. A/C OK TO CONTINUE.'